WO2021259895A1 - A method of laying a pipeline on a seafloor, monitoring surrounding zones of the installed pipeline for approaching vessels and warning vessels considered to be able to cause harm to the pipeline - Google Patents
A method of laying a pipeline on a seafloor, monitoring surrounding zones of the installed pipeline for approaching vessels and warning vessels considered to be able to cause harm to the pipeline Download PDFInfo
- Publication number
- WO2021259895A1 WO2021259895A1 PCT/EP2021/066913 EP2021066913W WO2021259895A1 WO 2021259895 A1 WO2021259895 A1 WO 2021259895A1 EP 2021066913 W EP2021066913 W EP 2021066913W WO 2021259895 A1 WO2021259895 A1 WO 2021259895A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pipeline
- zone
- vessels
- subsea
- vessel
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/12—Laying or reclaiming pipes on or under water
- F16L1/20—Accessories therefor, e.g. floats, weights
- F16L1/24—Floats; Weights
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
- E02B17/0017—Means for protecting offshore constructions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/12—Laying or reclaiming pipes on or under water
- F16L1/123—Devices for the protection of pipes under water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/12—Laying or reclaiming pipes on or under water
- F16L1/16—Laying or reclaiming pipes on or under water on the bottom
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G3/00—Traffic control systems for marine craft
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G3/00—Traffic control systems for marine craft
- G08G3/02—Anti-collision systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
- H02G1/10—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle in or under water
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
Definitions
- the present invention relates to the field of laying and protecting subsea pipelines. Background of the invention
- Subsea pipelines laid on the seafloor often require some kind of protection in order to minimize the chances of damage if subject to interaction with trawl gear from fishing vessels and or anchor(s) from vessels. This is particularly important in relatively shallow waters, such as water depths up to 1000 meters.
- the subsea pipelines may be a rigid pipe, a flexible pipe, a cable or an umbilical or combinations of these.
- the rigid and flexible pipes are used for transporting fluids, such as oil, gas, water, condensate, and any combination thereof to a surface installation such as floating vessel or an installation on shore or between offshore installations.
- Umbilicals are used for transporting combinations of hydraulic fluids, electrical power, gas and/or chemicals from a surface installation to a subsea structure or between offshore structures or even between subsea structures .
- the subsea structure may be a satellite well, a cluster of wells, a manifold, a processing unit, or another subsea unit.
- the surface installation can be a Floating Production Storage and Offloading (FPSO) or another floating installation.
- FPSO Floating Production Storage and Offloading
- the current routine method is to provide physical protection to the infrastructure by means of covers or rock berms or to place the infrastructure out of harms way by means of dredging or trenching.
- US5193937A describes a concrete or the like mattress for laying over a pipeline on the seabed.
- the mattress comprises an elongate recess or tunnel having an insulating material located therein.
- the mattress is laid over a subsea pipeline so that the pipeline is received within the insulant-containing tunnel.
- the pipeline is thus physically protected and thermally insulated.
- the mattress can comprise a plurality of concrete or like members articulated together.
- W02017/070289A1 relates to a pipe-clamping mattress for subsea pipelines.
- the document discusses solutions for issues relating to pipelines transporting oil and gas which pipelines may “walk” along the seafloor. These pipelines can extend over large distances. During production, these pipelines may have a tendency to move or "walk” due to thermal expansion and contraction of the pipelines resulting in possible damages to connections etc.
- W002/02979 relates to a method of stabilizing a submarine elongated structure laying on a submarine surface by laying a cover of an underwater settable material, such as a cementitious material, over and along said elongated structure.
- One of the objectives of this invention is to provide an alternative cheaper solution for laying and protecting subsea pipelines or parts of subsea pipelines, simplifying the subsea operation.
- one of the objectives of the invention is to reduce the amount of mechanical or physical protection needed for protecting a subsea pipeline.
- Another objective is to reduce the amount of trenching or dredging of the seafloor prior to laying of subsea pipelines in order to protect the subsea pipeline.
- a third objective is to provide a method avoiding the use of physical guard vessels during laying and protection of a pipeline.
- the invention relates to a method for installing a pipeline.
- the method reduces the amount of physical and mechanical protection systems needed around the pipeline, by replacing the protection related part of subsea installation work with a digital solution in which approaching vessels can be monitored while sailing in the vicinity or towards an uncovered subsea pipeline, and one may possibly communicate with the approaching vessel to avoid damages to the subsea pipeline.
- a method is described of laying a pipeline on a seafloor, wherein the method comprises protecting the pipeline with at least two types of protection, and wherein the method comprises the steps of: bringing the pipeline to an offshore location using a vessel, laying the pipeline on the seafloor using the vessel, defining a first zone surrounding at least a first part length of the pipeline when laid subsea, wherein the first part length is uncovered, covering at least a second part length of the pipeline when laid subsea with a physical protection means, defining a second zone extending from the first zone, monitoring the second zone for vessels approaching the first zone, analysing vessels detected during said monitoring of the second zone, for the purpose of determining whether the vessels can cause harm to the first part length of the pipeline, for each vessel monitored in the second zone and considered to be able to cause harm to the first part length of the pipeline, informing the vessel about the first zone and/or requesting the vessel not to enter into the first zone.
- the first zone may be defined as a vertical projection of the pipeline on the surface of the water.
- the first zone may be defined as the vertical projection of the pipeline on the surface of the water including an extension in all directions around the vertical projection. Said extension can range from a few meters and up to thousands of meters and may serve as a safety zone.
- the step of informing the vessel about the first zone may include information about the depth of the pipeline and that the vessel should lift the trawl above the depth of the pipeline.
- Said second zone may encircle the first zone.
- the second zone preferably comprises the first zone.
- uncovered with respect to a part length of the pipeline shall in this context be understood as a section of the pipeline which is not buried, nor positioned in a trench, nor covered with a physical protection etc., which is the case in the prior art solutions discussed above.
- an uncovered part of the pipeline resting on the seabed shall in this context be understood as a section of the pipeline which is not buried, nor positioned in a trench, nor covered with a physical protection etc., which is the case in the prior art solutions discussed above.
- the physical protection means may provide a physical or mechanical protection.
- the laid pipeline may thus have at least two types of protection.
- the first part length of the pipeline and the second part length of the pipeline may be protected in accordance with the method above.
- the second part length of pipeline may be covered with for instance rock dump or a part of the pipeline in the vicinity of a subsea or offshore structure could be covered by conventional trawl/dropping object protection covers.
- Said step of covering may comprise covering said second part length of the pipeline with rocks.
- Said second part length of the pipeline may be laid at or close to an offshore installation and/or at or close to shore.
- the subsea pipeline may be a fluid pipeline.
- the subsea pipeline may be a cable, such as an electrical cable.
- the subsea pipeline may be a combination of a fluid pipeline and a cable.
- the method may comprise laying the pipeline between an offshore installation and a satellite well.
- the method may comprise laying the pipeline between an offshore installation and shore.
- the method may comprise laying the pipeline between an offshore installation and another offshore installation.
- the second zone may extend a sufficient distance of nautical miles from a vertical projection of the pipeline on the surface of the water.
- Second zone Use satellite(s) and/or other tools to monitor the activities in the second zone, and identify the potential vessel(s) approaching to the first zone based on data.
- Base stations have near-real time AIS (Automatic Identification System) coverage and near perfect resolution, meaning that the latency might be seconds and at most minutes. Further, some base stations are placed at offshore installations in the North Sea, enhancing the AIS surveillance possibility. These base stations are both governmentally and privately owned.
- the AIS is an automatic tracking system that uses transponders on ships and is used by vessel traffic services (VTS). When satellites are used to detect AIS signatures, the term Satellite-AIS (S-AIS) is used.
- AIS information supplements marine radar, which continues to be the primary method of collision avoidance for water transport.
- Vessels outside the coastal areas i.e. in a sufficient distance from shore, are expected to carry AIS, i.e. there should be a very low number of vessels without AIS and other types of communication and navigation equipment. Due to the uncertainties with the vessel composition in coastal areas, alternative solutions should be limited to non -coastal areas.
- AIS Automatic Identification System
- ATON AIS Aids to Navigation
- AIS transceivers can be equipped to a floating or fixed unit, e.g. an aid to navigation such as a buoy.
- virtual ATONs that is, ATONs that appear on nearby vessels’ maps but are not physical unit
- the field can be marked on approaching vessels’ Electronic Chart Displays (ECDIS) maps.
- the AIS broadcast provides the position and purpose of an aid, such as a port or a starboard lateral buoy, even before it is physically close enough to be visible from the bridge of a ship.
- AIS monitoring will allow for observation of large areas, and automatically alarms, should a vessel approach the unprotected asset(s). Further, if a vessel should come close the first zone, the AIS ATONs can transmit virtual markers, appearing on the passing vessel’s ECDIS, marking the unprotected asset. This can provide enhanced situational awareness for the passing vessels, with the assets clearly marked for the vessels to navigate around.
- this solution is suitable for fields further than approximately 30 nautical miles from the coast or shore. For fields closer than 30 nautical miles off the coast, traditional solutions are more suitable, as one cannot rely on the vessels carrying AIS or any communication equipment.
- This may include, more specifically, a solution comprising a combination of the following:
- Satellite phone An approaching vessel, monitored by AIS; is contacted by satellite phone. If the satellite phone number is not available, the closest available vessel (of which the satellite number is known) is called by satellite phone by a shore-based supervisor.
- GDSS Global Maritime and Distress Safety System
- MMSI Maritime Mobile Service Identity
- MF DSC Medium Frequency Digital Selective Calling
- VHF Very High Frequency
- AIS ATON with AIS message The approaching vessel receives an AIS warning message and can observe the ATON (both the real and the virtual ATON) through its ECDIS, and if close enough, it can observe the real ATON by sight and radar.
- one or more real AIS ATONs e.g. a spar buoy placed in the field, with several virtual AIS ATONs marking the pipeline at the seabed, could be used.
- a buoy would be the size of a typical navigational marker.
- This buoy could also be equipped with a radar reflector, marking it for vessels who for some reason have turned off their AIS transponder.
- naval ships may also receive information about the ongoing operation even though their AIS is being operated in receiving mode only, and not transmitting mode.
- An AIS transceiver located about five meters above sea level would typically have a range of approximately 10 kilometres, on average. If a constraint that no point on the subsea pipeline is included, measured vertically from the surface, is to be at least six kilometres within AIS coverage, one would need a real AIS ATON approximately every 14th kilometre. This would give at least 10 minutes for a ship/vessel traveling at 20 knots to be notified of the ATONs and 20 minutes for a ship/vessel traveling at 10 knots, and 40 minutes for a ship/vessel traveling at 5 knots, i.e. sufficient time to make a navigational manoeuvre to avoid the area around the pipeline in the first zone.
- the solution will be less complex, due to less scope during subsea installation period, and shorter project time of a typical subsea oil and gas project.
- Fig. 1A is a side view of a vessel laying a subsea pipeline laying on a seafloor;
- Fig. IB is a top view of a pipeline on a seafloor, where a first part length of the pipeline corresponds to a first zone, and where a second zone extends from the first zone;
- Fig. 1C is a top view of an uncovered first part length of a pipeline on a seafloor, where there are arranged six real AIS ATONs along the first part length of a pipeline and virtual AIS ATONs in between the real AIS ATONs, where the circles indicate a coverage area of the real AIS ATONs which coverage area represents the second zone;
- Fig. 2A is a top view of a subsea laid pipeline extending from a subsea location to a position on shore, where the pipeline is divided in an uncovered first part length of pipeline protected by real AIS ATONs and virtual AIS ATONs at a part of the pipeline farthest away from shore and a covered second part length of the pipeline closest to shore, where the cover is formed by rocks;
- Fig. 2B is a top view of a subsea laid pipeline extending from a subsea location to a subsea installation, where the pipeline is divided in an uncovered first part length of pipeline at a part of the pipeline farthest away from the subsea installation and a covered second part length of the pipeline closest to the subsea installation, where the cover is formed by a protective structure;
- Fig. 2C is a top view of a subsea laid pipeline extending between two offshore installations, where the pipeline is divided in an uncovered first part length of pipeline between two covered part lengths of the pipeline closest to the offshore installations, where the covers are formed by a protective structure;
- Fig. 3 shows a sequence of laying a pipeline on a seafloor according to the present invention
- Fig. 1A is a side view of a vessel 3 laying a subsea pipeline 1 on a seafloor 2.
- the vessel 3 moves on a surface 4 of water.
- the vessel 3 can be any pipe-laying vessel 3.
- Such pipe-laying vessels 3 are known to the skilled person and will not be further described herein.
- Fig. IB is a top view of a pipeline 1 on a seafloor.
- the pipeline 1 is divided in a first part length of the pipeline 1’ and a second part length of pipeline 1”.
- the first part length of the pipeline G corresponds to a first zone 10. I.e. the first zone is the vertical projection of the first part length of the pipeline G on the water surface.
- the first part length of pipeline 1’ is at a depth were protection is required in order to avoid trawls and or anchors from vessels which can damage the pipeline.
- the first part length of pipeline G is uncovered and is rather protected by monitoring vessels entering a second zone, which second zone 20 extends from the first zone 10.
- the second zone 20 encloses the first zone 10.
- the second zone 20 is monitored 20 for vessels approaching the first zone 10, the vessels detected during said monitoring of the second zone 20 are analysed for the purpose of determining whether the vessels 20 can cause harm to the first part length of the pipeline G.
- Each vessel monitored in the second zone 20 and considered to be able to cause harm to the first part length of the pipeline 1 ’ are informed about the first zone G and/or it is requested that the vessel does not to enter into the first zone G.
- Fig. 1C is a top view of an uncovered first part length of a pipeline G on a seafloor.
- This first part length of pipeline G is, similar to the first part length of pipeline G in Fig. IB at a depth were protection is required in order to avoid trawls and or anchors from vessels which can damage the pipeline.
- it is arranged six real AIS ATONs 30 along the first part length of a pipeline 1’ and virtual AIS ATONs 31 in between the real AIS ATONs 30.
- the circles indicate a coverage area of the real AIS ATONs 30, which coverage area represents the monitored second zone 20.
- the real AIS ATONS 30 may be positioned on a spar buoy placed in the field, with several virtual AIS ATONs 31 marking the first part length of the pipeline G at the seafloor.
- a buoy would be the size of a typical navigational marker.
- This buoy could also be equipped with a radar reflector, marking it for vessels who for some reason have turned off their AIS transponder. Additionally, with the position messages being broadcast, naval ships may also receive information about the ongoing operation even though their AIS is in turned to receiving mode only, and not transmitting mode.
- Fig. 2A is a top view of a subsea laid pipeline 1 extending from a subsea location to a position on shore 40.
- the pipeline 1 is divided in an uncovered first part length of pipeline 1’ virtually protected by real AIS ATONs 30 and virtual AIS ATONs 31 at a part of the pipeline 1 farthest away from shore 40 and a covered second part length of the pipeline 1” closest to shore 40.
- the cover is formed by rocks 5.
- Fig. 2B is a top view of a subsea laid pipeline 1 extending from a subsea location to a subsea installation 50.
- the pipeline 1 is divided in an uncovered first part length of pipeline G at a part of the pipeline farthest away from the subsea installation 50 and a covered second part length of the pipeline 1” closest to the subsea installation 50.
- the cover is formed by a protective structure 6.
- Fig. 2C is a top view of a subsea laid pipeline 1 extending between two offshore installations 60.
- the pipeline 1 is divided in a first part length of pipeline 1’, a second part length of pipeline 1” and a third part length of pipeline G”.
- the second and third part lengths of pipeline are closest to the offshore installations 60 and are both covered by a protective structure 6.
- the first part length of pipeline 1’ which is arranged between the second and third part lengths of pipeline 1”, 1’” is uncovered.
- Fig. 3 shows a possible sequence of a method of laying a pipeline on a seafloor according to the present invention (reference 100), defined by the steps of:
- first part length of pipeline G which is at a depth were protection is required in order to avoid trawls and or anchors from vessels which can damage the pipeline.
- first part length of pipeline G is uncovered and is rather protected by monitoring vessels entering the second zone 20.
- Each vessel monitored in the second zone 20 and considered to be able to cause harm to the first part length of the pipeline 1’ is informed about the first zone 10 and/or requested not to enter into the first zone 10.
- the means of monitoring and informing may vary dependent on the requirements in the specific projects, and may include but are not limited to the examples above: real and virtual AIS ATONS, S- AIS, AIS message, radar, visual inspection (camera), satellite phone, GMDSS, MF DSC, VHF and ECDIS etc.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Ocean & Marine Engineering (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Emergency Alarm Devices (AREA)
- Pipeline Systems (AREA)
- Earth Drilling (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21735255.8A EP4172521A1 (en) | 2020-06-25 | 2021-06-22 | A method of laying a pipeline on a seafloor, monitoring surrounding zones of the installed pipeline for approaching vessels and warning vessels considered to be able to cause harm to the pipeline |
US18/010,593 US20230313910A1 (en) | 2020-06-25 | 2021-06-22 | A Method of Laying a Pipeline on a Seafloor, Monitoring Surrounding Zones of the Installed Pipeline for Approaching Vessels and Warning Vessels Considered to be Able to Cause Harm to the Pipeline |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20200745 | 2020-06-25 | ||
NO20200745A NO346244B1 (en) | 2020-06-25 | 2020-06-25 | A method of laying a pipeline on a seafloor, monitoring surrounding zones of the installed pipeline for approaching vessels and warning vessels considered to be able to cause harm to the pipeline |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021259895A1 true WO2021259895A1 (en) | 2021-12-30 |
Family
ID=76641693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2021/066913 WO2021259895A1 (en) | 2020-06-25 | 2021-06-22 | A method of laying a pipeline on a seafloor, monitoring surrounding zones of the installed pipeline for approaching vessels and warning vessels considered to be able to cause harm to the pipeline |
Country Status (4)
Country | Link |
---|---|
US (1) | US20230313910A1 (en) |
EP (1) | EP4172521A1 (en) |
NO (1) | NO346244B1 (en) |
WO (1) | WO2021259895A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114754992A (en) * | 2022-04-08 | 2022-07-15 | 中国石油大学(北京) | System and method for testing damage of trawl board accident to submarine pipeline |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114925413B (en) * | 2022-03-25 | 2024-03-29 | 中海石油(中国)有限公司天津分公司 | Submarine pipeline crossing protection processing method |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5193937A (en) | 1989-11-10 | 1993-03-16 | Seamark Systems Limited | Seabed stabilization mattresses |
WO2002002979A1 (en) | 2000-07-04 | 2002-01-10 | Neptune Technologies Pty Ltd | Method and apparatus for stabilising a submarine elongated structure |
CN101859497B (en) * | 2009-10-19 | 2012-02-22 | 浙江省电力公司舟山电力局 | Monitoring device for preventing passing ship from damaging submarine cable |
US20130041523A1 (en) * | 2010-03-19 | 2013-02-14 | Gatehouse A/S | Method and system for proteciton of subsea assets |
EP2635875A1 (en) * | 2010-11-05 | 2013-09-11 | NKT Cables Group A/S | An integrity monitoring system and a method of monitoring integrity of a stationary structure |
WO2017070289A1 (en) | 2015-10-22 | 2017-04-27 | Shell Oil Company | Pipe-clamping block |
CN109633556A (en) * | 2018-12-12 | 2019-04-16 | 上海无线电设备研究所 | A kind of sea cable monitoring and protecting system |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO338742B1 (en) * | 2015-05-26 | 2016-10-17 | Subsea 7 Norway As | Protecting Subsea Structures |
-
2020
- 2020-06-25 NO NO20200745A patent/NO346244B1/en unknown
-
2021
- 2021-06-22 EP EP21735255.8A patent/EP4172521A1/en active Pending
- 2021-06-22 US US18/010,593 patent/US20230313910A1/en active Pending
- 2021-06-22 WO PCT/EP2021/066913 patent/WO2021259895A1/en active Search and Examination
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5193937A (en) | 1989-11-10 | 1993-03-16 | Seamark Systems Limited | Seabed stabilization mattresses |
WO2002002979A1 (en) | 2000-07-04 | 2002-01-10 | Neptune Technologies Pty Ltd | Method and apparatus for stabilising a submarine elongated structure |
CN101859497B (en) * | 2009-10-19 | 2012-02-22 | 浙江省电力公司舟山电力局 | Monitoring device for preventing passing ship from damaging submarine cable |
US20130041523A1 (en) * | 2010-03-19 | 2013-02-14 | Gatehouse A/S | Method and system for proteciton of subsea assets |
EP2635875A1 (en) * | 2010-11-05 | 2013-09-11 | NKT Cables Group A/S | An integrity monitoring system and a method of monitoring integrity of a stationary structure |
WO2017070289A1 (en) | 2015-10-22 | 2017-04-27 | Shell Oil Company | Pipe-clamping block |
CN109633556A (en) * | 2018-12-12 | 2019-04-16 | 上海无线电设备研究所 | A kind of sea cable monitoring and protecting system |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114754992A (en) * | 2022-04-08 | 2022-07-15 | 中国石油大学(北京) | System and method for testing damage of trawl board accident to submarine pipeline |
CN114754992B (en) * | 2022-04-08 | 2023-08-11 | 中国石油大学(北京) | System and method for testing damage of trawl board accident to submarine pipeline |
Also Published As
Publication number | Publication date |
---|---|
EP4172521A1 (en) | 2023-05-03 |
NO346244B1 (en) | 2022-05-09 |
NO20200745A1 (en) | 2021-12-27 |
US20230313910A1 (en) | 2023-10-05 |
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